21.7. Removal of an air duct of air supply in a back part of salon

We remove a floor casing (see. "Removal of a casing of a floor").

The crosswise screw-driver we unscrew the self-tapping screw of fastening of a back part of an air duct to a floor.

We remove back...

... average...

... and lobby of a part of an air duct.

We establish an air supply air duct in a back part of salon in the return sequence.